I did a recheck ( I let the car get to operating temps and then let the AC run till the car was cool before opening the low and high side coupling valves) and the low side is now showing 40psi and the high side is showing a steady 250psi.
Well, 40 psi puts your evaporator core temp at 45 degrees and 250 psi puts the condenser at 145 degrees. Giving 5-10 degrees transfer temp that puts the evaporator vent air at 55 degrees. Not too good, if the car interior was cooled down. Condensers with adequate airflow through them
should run 30-40 degrees above the incoming ambient air temperature (Rule of thumb: multiply the ambient air temp X 2.2 to get the correct high side pressure). So if the outside air was 105 degrees when you took the 250 psi (145 degrees) measurement, the high side is working to spec.
If it was LESS than 105 degrees out at the time, then the condenser temp is probably up due to inadequate air flow and/or overcharge and the excess heat load generated by this excess refrigerant in the high side of the system is flowing back with the refrigerant into the low side, preventing adequate heat absorption and evaporation action in the evaporator, causing higher low side pressure and temperature, resulting in poor performance.
You be the judge.